1231651713471 has 4 divisors (see below), whose sum is σ = 1642202284632. Its totient is φ = 821101142312.

The previous prime is 1231651713451. The next prime is 1231651713473. The reversal of 1231651713471 is 1743171561321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1231651713471 - 2⁹ = 1231651712959 is a prime.

It is a super-3 number, since 3×1231651713471³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231651713473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205275285576 + ... + 205275285581.

It is an arithmetic number, because the mean of its divisors is an integer number (410550571158).

Almost surely, 2^{1231651713471} is an apocalyptic number.

1231651713471 is a deficient number, since it is larger than the sum of its proper divisors (410550571161).

1231651713471 is an equidigital number, since it uses as much as digits as its factorization.

1231651713471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410550571160.

The product of its digits is 105840, while the sum is 42.

The spelling of 1231651713471 in words is "one trillion, two hundred thirty-one billion, six hundred fifty-one million, seven hundred thirteen thousand, four hundred seventy-one".